JP2022532339A - Methods and systems for testing adhesives used in women's care pads - Google Patents

Abstract

A system for testing adhesives used on adhesive-backed sanitary articles, such as feminine care pads, nursing pads or some adult incontinence pads, includes a first substrate defining a gap for positioning a weight and a second substrate. A substrate is provided and a weight moves over the substrate to separate the adhesive-coated sanitary article from the fabric material by using a force measuring system. A method utilizes this system to measure the force with which the weight moves after contact with the adhesive-coated sanitary article. The measured force reflects the entire system, both the force required for the adhesive between the article and the fabric material to fail and the force required for the article to become pleated. One or two weights can be used depending on the given test.

Description

The present invention relates to methods and systems for testing the adhesive properties of adhesives used to attach adhesive sanitary articles, such as women's care pads, onto fabrics.

Some sanitary articles have an adhesive on their outer surface, which is intended to face clothing such as underwear, brassiere or swimwear, thereby adhering the article to the clothing. The inner surface of these sanitary items (ie, the surface facing the body) is intended to absorb body fluids. These hygiene items include female care pads, breast milk pads and some adult incontinence pads.

As can be understood, the adhesive is applied to clothing under various conditions, such as after being exposed to elevated temperatures, being insulted with body fluids, and despite being subjected to forces in multiple directions. Good adhesion is important. In addition, the adhesive must be adequately adhered to the various fabrics used in underwear and swimwear now and in the future.

Simulate specific conditions to predict the usefulness of any particular adhesive, the amount of adhesive adhered, and the adhesive pattern used for the article for these articles, especially women's care pads. It turns out to be difficult to do. As such a test, there was a peeling test in which an article was joined to a cloth material in an unsupported state and a peeling test was performed by pulling them apart. Another test was to see if there was a leak in the dirty pad when non-linear or dynamic movement was applied, for example by twisting, without being adhered to the fabric.

For testing sanitary goods, there are standards, eg, standards collected by the EDANA Nonwovens Industry Group. Most of these tests are for the properties of non-woven materials, film materials and absorbent materials used to make sanitary products (ie, tear strength of non-woven materials, burst strength of film materials, or super-absorbent polymers. Absorbability), absorbability and leakage of assembled absorbent hygiene articles, and general guidelines for proper experimental planning, data collection and data analysis (eg, Composite Lamination Strength), ie peeling tests. ). There is no generally acceptable standard method for testing the properties of absorbent hygiene products that keep them in place during use.

It is desirable to develop methods and systems for more accurately predicting the usefulness of adhesives, specific adherence amounts and adhesive patterns in adhesive hygiene articles. Not only is it desirable to identify the presence of any movement of the article with respect to the fabric, but it is also useful to determine the mechanism of breakage as well as the force required to bring about such movement.

In view of the drawbacks of the prior art, one embodiment of the present invention includes a method of testing an adhesive used in an adhesive sanitary article, wherein the method comprises adhering a cloth material to a first substrate and first. A step of fixing the cloth material on the upper surface of the substrate, a step of arranging at least one weight on the upper surface, and a step of attaching a lead wire to the at least one weight, and a hygiene with an adhesive attached to the cloth material. A step of adhering articles, a step of attaching a second substrate to a first substrate, and a force applied to at least one weight to move at least one weight on the cloth material and with an adhesive from the cloth material. It comprises the step of measuring the force as the at least one weight moves after contact with the adhesive sanitary article while separating the sanitary article.

According to another embodiment of the invention, the system for testing the adhesive used in the adhesive sanitary article was adapted to accept the cloth material and the adhesive sanitary article adhered to the cloth material. A first substrate having an upper surface, a second substrate attached to the first substrate by defining a gap between the first substrate, and at least one stack placed on the upper surface and positioned in the gap. At least one weight is glued while exerting a force on the weight and at least one weight to move at least one weight on the cloth and separate the glued sanitary article from the cloth. Includes a force measuring system that measures the force when moving after contact with a sanitary article.

According to another embodiment of the invention, a plurality of adhesive formulations tested by the methods and systems of the invention, such as 10, 50 or 100 possible adhesive formulations, according to the methods and systems of the invention. On the other hand, the adhesive formulation can be specified as a formulation having optimum adhesive properties. In one embodiment, such an adhesive formulation demonstrates the optimum adhesive properties used to attach a female care pad to a fabric. The present invention contemplates such an adhesive formulation and a female care pad made of such an adhesive formulation.

It should be understood that both the overall description described above and the detailed description below are illustrative, not limiting, to the present invention.

The present invention is best understood from the following detailed description when read in connection with the accompanying drawings. Following common practice, it is emphasized that the various features of the drawing are not at the exact scale. The drawings include the following figures.

FIG. 3 is a perspective view of an assembled system for testing an adhesive used in an adhesive sanitary article according to an embodiment of the invention. It is a top view of the component of the system shown in FIG. It is a top view of some components of the system shown in FIG. 1, including a first substrate. It is a top view of the 2nd substrate of the system shown in FIG. FIG. 3 is a top view of a first substrate of the system shown in FIG. 1 to which an adhesive hygiene article with wings is attached. The preferred cut in the cloth material according to one embodiment of the present invention is shown. A preferred crease in the fabric material according to one embodiment of the present invention is shown. It is a top view of the first substrate of the system shown in FIG. 1 to which an adhesive hygiene article having a wing is attached, and the wing is attached to the lower surface of the first substrate adjacent to the recess of the first substrate. There is. FIG. 3 is a top view of some of the components of another embodiment of the invention, including the first substrate. It is a top view of the 2nd substrate of the system shown in FIG. 7A. It is a graph which shows the load vs. distance achieved by testing the female care pad according to the embodiment of this specification.

One embodiment of the invention is a system for testing adhesives used in adhesive hygiene articles, such as women's care pads, breast milk pads or some adult incontinence pads, adapted to adhere to underwear. Regarding. As shown in FIGS. 1, 2, 3A and 3B, the system 10 includes a first substrate 12, a second substrate 14 attached to the first substrate, and at least one weights 16a and 16b, and a force. A measurement system 18 is provided. The first substrate 12 has a cloth material 22 and a top surface 20 adapted to receive the adhesive sanitary article 24 adhered to the cloth material. The second substrate 14 defines a gap 26 in the first substrate between the first substrate and the second substrate, that is, between the upper surface 20 of the first substrate and the lower surface of the second substrate (for example,). Installed (via nuts and bolts). A wide range of materials can be used for the first substrate 12 and the first substrate 14, and it has been found that plexiglass is suitable. At least one weights 16a and 16b are arranged on the upper surface 20 of the first substrate 12 and positioned in the gap 26. Although the term "weight" is used, it is not essential that a true "weight" be used, any block or solid of other shapes may be used, and force measuring systems are well known and well known. Can be programmed in a way. The force measuring system applies tension to at least one weight 16a, 16b to pull the at least one weight onto the fabric 22 and separate the adhesive sanitary article 24 from the fabric, at least one. It serves to measure the force with which the weight moves after contact with the adhesive sanitary article. The system is otherwise configured by, for example, applying pressing force from the outside of at least one weight toward each other to move at least one weight on the fabric and with adhesive from the fabric. It may be possible to measure the force while separating the sanitary article 24.

Although the illustrated embodiments show women's care pads as hygienic articles, the systems and methods of the invention can be used with any other adhesive sanitary article such as breast milk pads and adult incontinence pads. In addition, the systems and methods of the invention can be used with women's care pads with or without wings. In addition, the systems and methods of the invention can be used with a wide range of fabrics, i.e. any fabric suitable for clothing, especially underwear. Thus, the fabric can include cotton, polyester, silk, nylon, spandex, elastane, regenerated cellulose, wool, or mixtures thereof.

In the embodiments shown in FIGS. 1, 2, 3A and 3B, each of the weights 16a, 16b has lead wires 28a, 28b attached to and extending from it, respectively. When assembled, the leads 28a, 28b extend through the opening 30 of the second substrate 14 and are accepted by the opening 30 and attached to the force measuring system 18 through the opening 2. The system can be configured by another method, such as supplying the lead wire to the force measuring system 18 by another route such as passing through the opening of the first substrate 12. Although not shown, it is preferable to connect the lead wires so that the force measuring system 18 starts the movement of the two weights 16a and 16b at the same time and moves them equidistantly. The embodiments shown in FIGS. 1, 2, 3A and 3B use two weights 16a and 16b (referred to herein as a bunch test) and are shown in FIGS. 7A and 7B below. The embodiments shown use a single weight (referred to herein as a side test).

It is desirable to attach the cloth material 22 so that the cloth material 22 is smoothly and substantially fixed on the first substrate 12. The reason for this is to ensure that the force reflects the disengagement of the article 24 from the fabric 22 when measured, but does not reflect the separation of the fabric from the first substrate 12. When reflecting the latter, this can adversely affect the accuracy of the data, as the force does not only reflect the disengagement of the article 24 from the fabric 22. This substantial fixation can be achieved by hook-and-loop attachment of the fabric 22 to the first substrate 12 in the embodiments shown in FIGS. 1, 2, 3A and 3B. In particular, the system 10 further includes hook tape (not shown) adhered to the upper surface 20 of the first substrate 12 and the lower surface of the first substrate at the position where the cloth material is bent. The hook tape can be adhered to all or part of both sides of the first substrate 12, or more preferably only to those surfaces on which the fabric is intended to be placed during system operation. .. The fabric material serves as a loop material and is therefore substantially fixed by the hook-and-loop fastener mechanism.

In the system of the present invention, a force is applied to at least one weight to move the at least one weight on the cloth material, and the hygiene article with an adhesive is separated from the cloth material, while the at least one weight is used. Includes a force measuring system 18 that measures the force of movement after contact with an adhesive sanitary article. The force measuring system can be any known force measuring system used to measure the load moving the weight over the surface. Such force measuring systems are available from Norwood, Massachusetts Instruments. One system considered suitable is the Intron 5500R system. One end is coupled to a lead wire and the other end is coupled to a mounted and assembled substrate, for example, a protrusion extending away from the lower surface of the first substrate 12 and away from the second substrate 14. .. The force measurement system can be used in known ways, including using software associated with the system.

In the embodiments shown in FIGS. 5, 5A, 5B and 6, the system 10 is configured to receive an adhesive sanitary article 24 having wings 32a, 32b. These wings make the adhesive hygiene article better by allowing the wings to bend at the edges of the underwear and adhere to the outer surface of the underwear (ie, the surface of the underwear facing away from the body). It is known to be properly attached to underwear. To simulate this aspect, recesses 34a, 34b are formed in the first substrate 12, which serve to receive the wings 32a, 32b of the adhesive sanitary article 24. In addition, the recesses 34a and 34b receive the fabric 22 and allow the fabric 22 to be bent to the lower surface of the first substrate 12 adjacent to the recess. Thus, the wings are folded around the edges and glued to the fabric on the other side of the fabric, similar to when an adhesive hygiene article with wings is used by the wearer. It is intended to best simulate the pad as it is worn by the user.

To improve reproducibility, the weight can be turned inside out or twisted in a plane (ie, xy plane) defined by the gap 26 formed by the first substrate 12 and the second substrate 14. It is preferable to ensure that there is no such thing. This is preferable to ensure the reproducibility of the test. Including recesses 34a, 34b that receive the wings 32a, 32b is one way to avoid this. Another method is to provide the weights 16a and 16b with linear protrusions extending upward from the weight toward the second substrate 14 and extending parallel to the direction of movement during operation. be. This protrusion may fit into a linear groove formed on the lower surface of the second substrate 14 as the at least one weight moves. This serves to stabilize the weight, whether or not the article has wings. Further, it is preferable that the height of the gap 26 is close to the height of the weight so that the weight cannot move in the z direction which may affect the test result. In other words, it may not be desirable to allow the weight to rise and ride on top of the article. Preferably, the substrate and weight materials are selected so that little frictional resistance is generated.

Another feature of the embodiments of the present invention is the use of index point 36, which allows the user to mark the inside of the adhesive sanitary article at a point corresponding to a central contact point with the article of at least one weight. be. As shown, dots are arranged on the back of the article. Exposing the back of the pad to some force has been found to more accurately reflect the typical force applied to a female care pad. The pad is inspected to ensure that the second substrate is placed on top of the first substrate and the index points are aligned with the openings in the second substrate before the article is completely adhered to the fabric. (And move as needed).

According to another embodiment of the present invention, the method of testing an adhesive used for an adhesive sanitary article is to bond the cloth material 22 to the first substrate 12 and attach the cloth material on the upper surface 20 of the first substrate. A step of fixing, a step of arranging at least one weights 16a and 16b on the upper surface thereof, a step of adhering the sanitary article 24 with an adhesive to the cloth material, and a step of attaching the second substrate 14 to the first substrate. At least one weight with the adhesive sanitary article, while exerting a force on at least one weight to move the at least one weight onto the fabric material and separating the adhesive sanitary article from the fabric material. Includes a step of measuring the force of movement after contact. Thus, the measured force is the force required to prevent the adhesive from acting between the article and the fabric, and the force that causes the article to bunch. Reflect both with the required force.

In the embodiments shown in FIGS. 1, 2, 3A and 3B, the lead wires 28a and 28b are attached to the respective weights 16a and 16b, and the second substrate 14 has an opening 30 for receiving the lead wires. .. In this embodiment, the method further comprises the step of extending the leads 16a, 16b through the opening 30. As described above, it is preferable to connect the lead wires so that the force measuring system 18 starts the movement of the two weights 16a and 16b at the same time and moves them equidistantly. As described below, start measuring the force that tensions the wire to improve reproducibility and avoid making measurements that only tighten the wire (as opposed to moving the weight). Before, it is preferable to remove any slack from the wire. The method can include the use of two weights or one weight.

As mentioned above, in the embodiments shown in FIGS. 5, 5A, 5B and 6, the system 10 is configured to receive an adhesive sanitary article 24 having wings 32a, 32b. Methods of using such a system can include cutting the fabric so as to reduce the formation of pleats when the fabric is adhered to a substrate having recesses that receive the wings of the sanitary article. FIG. 5A shows a preferred cut in the fabric material. FIG. 5B shows preferred creases. These cuts and creases serve to wrap the fabric around the first substrate without wrinkles or pleats.

As can be understood, the fabric 20 retains the residual adhesive after several test cycles, thereby affecting its frictional resistance and thereby affecting the results, thereby adversely affecting it. There is a possibility that you will receive it. Therefore, it is preferable to replace the cloth material regularly. Preferably, the fabric is replaced after 3 to 20 test cycles, preferably after 3 to 10 test cycles, and most preferably after 3 to 7 test cycles.

As mentioned above, the method is adapted such that at least one weight has a linear protrusion and a second substrate is fitted to the lower surface thereof as the at least one weight moves. It can be used by having a corresponding linear groove. In addition, the method can include marking an indicator point inside the adhesive sanitary article at a point corresponding to the desired center contact point with the article of at least one weight.

According to one embodiment of the invention, the method applies a weight to the article, a step of soiling the article with a fluid, a step of exposing the article to an elevated temperature for a specified period of time, or a step of subjecting the article to an elevated temperature prior to the step of applying force. Further includes at least one of the steps. It is intended to simulate real-life scenarios that impose additional challenges on adhesives. For example, hygienic articles can get wet during use, can be exposed to elevated temperatures, or can be subject to additional force. Thus, these modifications to the methods of the invention may serve to better simulate these possible real-life scenarios.

The force measurement system can be selected to provide a wide range of useful data. Most important is the force (ie, load) required to move the weight as the article is separated from the fabric. Other values include the average load over a given distance, such as the range of distance the article is attached to the fabric, as well as the instantaneous load value or its gradient, especially at the point where the weight first contacts the article. Can be included. The method can further include from the measured force a step of obtaining the average force during the corresponding distance traveled when at least one weight is in contact with the adhesive sanitary article. In one embodiment, the value of the slope of the force-distance curve is indicated at the point where the article has just begun to move. High force values and / or high gradients in this regard reflect the preferred adhesive, adhesive load and / or adhesive pattern.

7A and 7B show alternative embodiments of the system of the invention in which only one weight is used. This embodiment is used to simulate how the adhesive, its amount of adhesion, and / or its application pattern respond to different force profiles applied to the article. In particular, the embodiments of FIGS. 7A and 7B simulate a situation in which a force is applied to an article from only one direction, thus causing article bunching over the entire width of the article. On the other hand, embodiments of FIGS. 1, 2, 3A and 3B simulate a situation in which forces are equally applied to the article from both directions, so that the folds of the article occur centrally from the edges of the article. do.

The embodiments shown in FIGS. 7A and 7B are generally the same as the embodiments shown in FIGS. 1, 2, 3A and 3B. As shown in FIG. 7A, the first substrate 52 has an upper surface 60 for receiving the cloth material 72, on which the sanitary article 64 with an adhesive can be adhered. The weight 56 is arranged on the upper surface 60 of the first substrate 52 and is positioned within the gap between the first substrate and the second substrate 52 after the second substrate is attached to the first substrate. A lead wire 68 extends across the entire width of the article and is fed through an opening 80 formed in the second substrate 54 shown in FIG. 7B, at which the lead wire 68 is a force. It extends to the measurement system and is attached to the force measurement system. As can be seen in FIG. 7B, the opening corresponds to the location where the lead 68 should extend upward from the gap between the substrates, i.e., at the edge of the article opposite the weight. As such, it is offset from the center of the width of the second substrate 54.

When implementing this method, the following methods can be used. First, the cloth material is attached to the first substrate by adhering the cloth (which acts as a loop) to the hook tape attached to the first substrate. The adhesive sanitary article is then attached to the fabric in the desired position, with the articles lined up so that at least one weight is in contact with the desired surface. To improve reproducibility, the article should be subjected to the same force when adhering the article to the fabric. For example, the same number of passes (eg, twice) on a standard 2 kg roller can be used without any additional downward pressure on the rollers. After the weight is positioned on the first substrate, leads are fed through the openings in the second substrate and the substrates are bolted together. The software associated with the force measurement system is then opened and the type of test (ie, bunch or side) is specified. The assembled system is then attached to the force measurement system by sandwiching the substrate within the lower jaws of the force measurement system and sandwiching the leads extending from the weight into the upper jaws of the force measurement system. The jaws are then adjusted to remove most of the slack from the string and the load cell is set to zero. The test is then performed by initiating a force measurement system. The system software controls the following: the speed at which the leads move is set to a specific value, the maximum force at which the system begins to record data is specified, and the distance the weight travels (eg, bunch test). 4-8 cm for the side test, 7-11 cm for the side test), the data is recorded and after the test the system returns the weights to their original position. Next, the user identifies in the data the position corresponding to the point where the weight was in contact with the article. The software calculates average loads and average gradient values over this range. The user also records comments about the corruption mode. After several tests (eg, 5 tests), a new sample of fabric material replaces the existing fabric material.

According to another embodiment of the invention, multiple adhesive formulations are tested by the methods or systems of the invention. It can be seen that each adhesive formulation has its own adhesive properties, based on the methods or systems of the present invention. An adhesive formulation with the optimum adhesive formulation can be identified. The number of formulations tested can be any number greater than 2, such as 10, 50 or 100, or any number greater than them. In one embodiment, such an adhesive formulation demonstrates the optimum adhesive properties used to attach a female care pad to a fabric. The present invention contemplates such an adhesive formulation and a female care pad made of such an adhesive formulation.

Aspects of the invention Aspects 1.
A method of testing adhesives used in adhesive hygiene articles.
The step of adhering the cloth material to the first board and fixing the cloth material on the upper surface of the first board,
A step in which at least one weight is placed on the upper surface thereof, and a lead wire is attached to at least one weight.
Steps to glue sanitary goods with adhesive to the fabric,
The step of attaching the second board to the first board,
A force is applied to at least one weight to move the at least one weight onto the fabric and separate the adhesive sanitary article from the fabric, while at least one weight is the adhesive sanitary article. Steps to measure the force when moving after contact, and
Including, how.

Aspect 2.
At least one lead is attached to at least one weight and the second substrate has an opening to receive at least one lead, the method of which extends at least one lead through the opening. The method of aspect 1, further comprising a step.

Aspect 3.
The method according to aspect 1 or 2, wherein at least one weight comprises one weight.

Aspect 4.
The method according to aspect 1 or 2, wherein at least one weight comprises two weights.

Aspect 5.
The method according to any one of aspects 1 to 4, wherein the cloth material is bent at the edge of the first substrate, and the cloth material is adhered to the lower surface of the first substrate.

Aspect 6.
The method according to any one of aspects 1 to 5, wherein the hook tape is adhered to the upper surface of the first substrate and the lower surface of the first substrate at the position where the cloth material is bent.

Aspect 7.
The adhesive sanitary article has a wing, the first substrate has a recess, and the recess accepts the wing of the adhesive sanitary article and the fabric that is folded to the underside of the first substrate adjacent to the recess. , A method according to any one of aspects 1 to 6.

Aspect 8.
7. The method of aspect 7, further comprising cutting the fabric to reduce the formation of pleats when the fabric is adhered to the first substrate.

Aspect 9.
7. The method of aspect 7, further comprising a step of cutting the wing or repositioning the article axially.

Aspect 10.
The method of any of aspects 1-9, further comprising the step of changing the fabric after 3-20 test cycles, preferably 3-10 test cycles, most preferably 3-7 test cycles.

Aspect 11.
The method of any of aspects 1-10, wherein the step to measure comprises measuring the force and the gradient of the force based on the linear distance traveled by the load of at least one weight.

Aspect 12.
One of aspects 1-11, further comprising obtaining from the measured force the average force during the corresponding distance traveled when at least one weight is in contact with the adhesive sanitary article. Method.

Aspect 13.
The method of any of aspects 1-12, wherein the hygiene article with adhesive is selected from the group consisting of female care pads, breast milk pads and adult incontinence pads with or without wings.

Aspect 14.
The embodiment in which at least one weight has a linear protrusion and the second substrate has a linear groove on its lower surface adapted to fit the protrusion as the at least one weight moves. Any method from 1 to 13.

Aspect 15.
The method of any of aspects 1-14, further comprising the step of marking an index point on the inner surface of the adhesive sanitary article at a point corresponding to the central contact point of the at least one weight with the article.

Aspect 16.
The method of any of aspects 1-15, wherein the fabric is selected from the group consisting of cotton, polyester, silk, nylon, spandex, elastane, regenerated cellulose, wool or mixtures thereof.

Aspect 17.
Aspects 1 to further include, prior to the force step, at least one of a step of soiling the article with a fluid, a step of exposing the article to an elevated temperature for a specified time, or a step of weighting the article. 16 methods.

Aspect 18.
A system for testing adhesives used in adhesive sanitary goods,
A first substrate with a top surface adapted to accept the fabric and the adhesive sanitary goods adhered to the fabric.
A second board attached to the first board by defining a gap between the first board and
With at least one weight placed on the top surface and positioned within the gap,
A force is applied to at least one weight to move the at least one weight onto the fabric and separate the adhesive sanitary article from the fabric, while at least one weight is the adhesive sanitary article. A force measuring system that measures the force when moving after contact,
The system.

Aspect 19.
18. The system of aspect 18, wherein the lead is further comprising a lead attached to at least one weight, the second substrate has an opening for receiving the lead, and the lead is attached to a force measuring system.

Aspect 20.
The system according to aspect 18 or 19, wherein at least one weight comprises one weight.

Aspect 21.
The system according to aspect 18 or 19, wherein at least one weight comprises two weights.

Aspect 22.
The system of any of aspects 18-21, further comprising hook tape adhered to the top surface of the first substrate and the bottom surface of the first substrate at the position where the fabric material is bent.

Aspect 23.
The system of any of aspects 18-22, wherein the first substrate has recesses, the recesses accepting a wing of an adhesive sanitary article and a fabric material that folds down to the bottom surface of the first substrate adjacent to the recess.

Aspect 24.
The embodiment in which at least one weight has a linear protrusion and the second substrate has a linear groove on its lower surface adapted to fit the protrusion as the at least one weight moves. Any system from 18 to 23.

Aspect 25.
The average force with which the force measuring system moves after contact with the adhesive sanitary article with at least one weight and the force-distance with which the force measurement system moves after contact with the adhesive sanitary article. The system of any of aspects 18-24, comprising means for determining the slope of the curve.

Aspect 26.
An adhesive formulation having optimal adhesive properties for a plurality of adhesive formulations tested by the method according to aspects 1-17 or the system of embodiments 18-25.

Aspect 27.
A female care pad made of the adhesive formulation according to embodiment 26.

The following provide examples of the use of the methods and systems of the present invention.

Adhesives for women's care pads were tested using the systems as shown in FIGS. 1, 2, 3A and 3B. The system used a plexiglass substrate and a 250 g brass weight. As a force measurement system, an Instron 5500R (including Bluehill Software) available from Illinois Tool Works was used. Two weights were used and therefore a bunch test was performed on a commercially available female care pad.

In carrying out this method, the cotton fabric was attached to the first substrate by adhering a cloth (which acts as a loop) to the hook tape attached to the first substrate. An adhesive hygiene article was then attached at the desired location on the fabric, i.e., so that the weight could contact the article along the entire facing side of the weight near the back of the article. .. Two passes of a standard 2 kg roller were performed to bond the article to the fabric without any additional downward pressure on the roller. After positioning the weight on the first substrate, the lead wire 62, the software associated with the force measurement system was opened and the type of test (ie, bunch) was specified. The assembled system was then attached to the force measurement system by sandwiching the substrate within the lower jaws of the force measurement system and sandwiching the leads extending from the weight into the upper jaws of the force measurement system. Next, I adjusted the jaws to remove most of the slack from the string and set the load cell to zero. The test was then performed by initiating a force measurement system.

The system software was set as follows.
a. The initial moving speed was set to 16.5 cm / min.
b. The force to start recording data was set to 50 gf (gram weight), which is felt at the default data acquisition speed.
c. The distance for moving the weight was set to 6.5 cm in the case of the bunch test.
d. The data were recorded data and the weights were returned to their initial position upon completion of the test run.

After the test, the user identified in the data a position corresponding to the point where the weight was in contact with the article, ie 3 cm to 6 cm. The software then calculated the average load and average gradient based on those inputs. The data from these five runs are attached as FIG. As can be seen, the first 3.5 cm reflects the movement of the weight along the fabric before the weight comes into contact with the article. Upon contact with the article, the load increases appropriately. The inspection allows the user to record where the article was first visibly moved. Optimal systems can be identified by comparing sets of data with different conditions, i.e. different articles, different adhesives, different adhesive loads and different adhesive patterns.

Claims (27)

A method of testing adhesives used in adhesive hygiene articles.
A step of adhering the cloth material to the first substrate and fixing the cloth material on the upper surface of the first board.
A step of arranging at least one weight on the upper surface, wherein a lead wire is attached to the at least one weight.
The step of adhering a sanitary article with an adhesive to the cloth material,
The step of attaching the second board to the first board,
While applying a force to the at least one weight to move the at least one weight on the cloth material and separating the adhesive sanitary article from the cloth material, the at least one weight is used. A step of measuring the force when moving after contact with the adhesive sanitary article,
Including, how. The at least one lead wire is attached to the at least one weight, the second substrate has an opening for receiving the at least one lead wire, and the method is the at least one through the opening. The method of claim 1, further comprising extending the lead wire. The method of claim 1, wherein the at least one weight comprises one weight. The method of claim 1, wherein the at least one weight comprises two weights. The method according to claim 1, wherein the cloth material is bent at an edge portion of the first substrate, and the cloth material is adhered to the lower surface of the first substrate. The method according to claim 1, wherein the hook tape is adhered to the upper surface of the first substrate and the lower surface of the first substrate at a position where the cloth material is bent. The adhesive sanitary article has a wing, the first substrate has a recess, and the recess is the wing of the adhesive sanitary article and the lower surface of the first substrate adjacent to the recess. The method according to claim 1, wherein the cloth material that can be folded up to is accepted. 7. The method of claim 7, further comprising cutting the fabric to reduce the formation of pleats when the fabric is adhered to the first substrate. 7. The method of claim 7, further comprising the step of cutting the wing or rearranging the article axially. The method of claim 1, further comprising changing the fabric after 3 to 20 test cycles, preferably 3 to 10 test cycles, most preferably 3 to 7 test cycles. The method of claim 1, wherein the measuring step comprises measuring the force and the gradient of the force based on a linear distance traveled by the load of the at least one weight. 11. Method. The method of claim 1, wherein the adhesive hygiene article is selected from the group consisting of female care pads, breast milk pads and adult incontinence pads with or without wings. The at least one weight has a linear protrusion, and the second substrate is adapted to fit the protrusion on the lower surface thereof when the at least one weight moves. The method according to claim 1. The method of claim 1, further comprising marking an index point on the inner surface of the adhesive sanitary article at a point corresponding to the central contact point of the at least one weight with the article. The method of claim 1, wherein the fabric is selected from the group consisting of cotton, polyester, silk, nylon, spandex, elastane, regenerated cellulose, wool or mixtures thereof. Prior to the force-applying step, the article further comprises at least one of a step of soiling the article with a fluid, a step of exposing the article to an elevated temperature for a specified period of time, or a step of weighting the article. , The method according to claim 1. A system for testing adhesives used in adhesive sanitary goods,
A first substrate having a top surface adapted to accept the fabric and the adhesive hygiene article adhered to the fabric.
A second substrate attached to the first substrate by defining a gap between the first substrate and the first substrate.
With at least one weight placed on the top surface and positioned within the gap,
While applying a force to the at least one weight to move the at least one weight on the cloth material and separating the adhesive sanitary article from the cloth material, the at least one weight is used. A force measuring system that measures the force when moving after contact with the adhesive sanitary article,
The system. The second substrate further comprises a lead attached to the at least one weight, the second substrate has an opening for receiving the lead, and the lead is attached to the force measuring system. 18. The system according to 18. 18. The system of claim 18, wherein the at least one weight comprises one weight. 18. The system of claim 18, wherein the at least one weight comprises two weights. The system according to claim 18, further comprising a hook tape adhered to the upper surface of the first substrate and the lower surface of the first substrate at a position where the cloth material is bent. 18. The first substrate has a recess, wherein the recess accepts the wing of the adhesive sanitary article and the fabric material that is bent to the lower surface of the first substrate adjacent to the recess. The system described in. The at least one weight has a linear protrusion, and the second substrate is adapted to fit the protrusion on the lower surface thereof when the at least one weight moves. The system according to claim 18. The force measuring system moves the average force when the at least one weight moves after contacting the adhesive sanitary article and after the at least one weight comes into contact with the adhesive sanitary article. 18. The system of claim 18, comprising means for determining the force of the force-the gradient of the distance curve. An adhesive formulation having optimum adhesive properties for a plurality of adhesive formulations tested according to the method according to claim 1. A care pad for women made of the adhesive formulation according to claim 26.

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